Is there a good web-app for generating tones to help tune musical instruments?

Since some of the instruments I play are a little obscure (eg. a guzheng, which has 25 strings; a charango, for which it's common to change frequently between tunings) my fantasy feature wish list would be:

Arbitrary pitches (eg. not limited to western scales)

A way to step through a sequence of an arbitrary number of tones that that correspond to a particular tuning of a specific instrument

Ability to save or link to such a sequence

Though I'd settle for a simple tone generator with a nice interface :)

I am a bit curious how you can be sure the computer will be playing the right tone? Several years ago I had a computer generating a tone that was supposed to be 1000hz a frequency counter showed it was closer to 1050hz.
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ZoredacheOct 22 '10 at 6:07

thanks, that sounds better that anything I've been able to find so far, but it's giving me a 403 Forbidden error :(
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Ian MackinnonOct 21 '10 at 23:20

@Ian Mackinnon: That's interesting, I just tried it again and it still works fine for me. Can you access this page? It gives some troubleshooting suggestions. Maybe try a different browser or computer and see if that makes a difference.
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BenVOct 21 '10 at 23:43